Searched for: +
(1 - 20 of 49)

Pages

document
Walraven, P.L. (author), Instituut voor Zintuigfysiologie TNO (author)
THE Stiles–Crawford effect1,2, or the dependence of luminous efficiency on the eccentricity of the point of entry of the light in the pupil, is a function of the wavelength of the light. In Fig. 1 is given the inverse 1/ of the luminous efficiency as a function of wave-length at a distance of 3.5 mm from the point of maximum efficiency,...
article 1966
document
Bouman, M.A. (author), Walraven, P.L. (author), Instituut voor Zintuigfysiologie TNO (author)
On the basis of measurements of the achromatic zone for red light in the fovea and for green light in the periphery, a discussion is given on the possible difference in threshold mechanisms for the achromatic (scotopic) and chromatic (photopic) retinal systems. A specific suggestion for this distinction is given that not directly refers to the...
article 1972
document
Bunt, A.A. (author), Sanders, A.F. (author)
An experiment is reported on the effects of cognitive similarity on proactive and retroactive interference (PI, RI) in short term memory. To avoid confounding between cognitive and acoustic similarity, the materials - i.e. words and digits - were matched with respect to vowel pattern. Effects of both PI and RI were found on recall of words,...
article 1972
document
Germans, F.H. (author), Koster, M.W. (author), Kwee, H.H. (author), Groep Motoriek Revalidatie, Medisch Fysisch Instituut TNO Instituut voor gezondheidstechniek TNO (author)
The merits of the 'vacuum form fixation' are discussed for the production of reliable body impressions of patients suffering from sitting problems. Impressions are taken with the patients seated in the desired posture. The first results are reported, obtained from 4 patients of different categories, fitted with individually moulded seats...
article 1974
document
Bunt, A.A. (author)
Thirty-two subjects had tests of serial recall of visually presented nine-digit lists which were either presented in a single block of trials (constant context) or in between lists of much longer length (variable context). Other variables were vocalization-during-presentation versus silent memorization (within subject) and order of recall ...
article 1976
document
Verheijen, J.H. (author), Nieuwenhuizen, W. (author), Wijngaards, G. (author), Gaubius instituut TNO (author)
Tissue activator-mediated plasminogen activation is potentiated both by fibrin and by some soluble fibrin(ogen) fragments. The potentiating effect of the different fragments decreases in the order fibrin monomer > D-dimer > Y > D EGTA > Dcate > X. Fibrinogen and the fragments Ecate, E EGTA and E fibrin have almost no effect. The existence of a...
article 1982
document
Nieuwenhuizen, W. (author), Haverkate, F. (author), Gaubius Instituut TNO (author)
Chemicals/CAS: fibrinogen, 9001-32-5; calcium, 7440-70-2; Calcium, 7440-70-2; Fibrinogen, 9001-32-5
article 1983
document
van 't Veer, P. (author), van der Wielen, R.P.J. (author), Kok, F.J. (author), Hermus, R.J.J. (author), Sturmans, F. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)
The association between breast cancer and selenium, measured in the diet, plasma, erythrocytes, and toenails, was investigated in a case-control study in the Netherlands during 1985-1987. Dietary selenium intake was assessed by a structured dietary history technique among 133 breast cancer cases and 238 population controls. Absolute and energy...
article 1990
document
Theeuwes, J. (author)
Three visual search experiments tested whether top-down selectivity toward particular stimulus dimensions is possible during preattentive parallel search. Subjects viewed multielement displays in which two salient items, each unique in a different dimension—that is, color and intensity (Experiment 1) or color and form (Experiments 2 and 3)—were...
article 1991
document
Havenith, G. (author), van de Linde, E.J.G. (author), Heus, R. (author)
Hand cooling and resulting comfort and pain were studied in 12 subjects, while touching six different materials (polyurethane foam, wood, nylon, rustproof steel, aluminium, and temperature-controlled metal) which were initially at ambient temperature. This was done for three ambient temperatures (-10°, 0° and 10°C), after pre-exposure exercise...
article 1992
document
Theeuwes, J. (author)
Three visual-search experiments tested whether the preattentive parallel stage can selectively guide the attentive stage to a particular known-to-be-relevant target feature. Subjects searched multielement displays for a salient green circle that had a unique form when surrounded by green nontarget squares or had a unique color when surrounded by...
article 1992
document
Instituut voor verouderings- en vaatziekten onderzoek TNO (author), van de Kar, N.C.A.J. (author), Monnens, L.A.H. (author), Karmali, M.A. (author), van Hinsbergh, V.W.M. (author)
The epidemic form of the hemolytic uremic syndrome (HUS), beginning with an acute gastroenteritis, has been associated with a verocytotoxin-producing Escherichia coli infection. The endothelial cell is believed to play an important role in the pathogenesis of HUS. Endothelial cell damage by verocytotoxin-1 (VT-1) in vitro is potentiated by the...
article 1992
document
Qvigstad, E. (author), Verloove-Vanhorick, S.P. (author), Ens-Dokkum, M.H. (author), Schreuder, A.M. (author), Veen, S. (author), Brand, R. (author), Oostdijk, W. (author), Ruys, J.H. (author), Nederlands Instituut voor Praeventieve Gezondheidszorg TNO (author)
To predict height at five years in a cohort of 565 very preterm and/or very low-birth-weight children, hypothesized growth determinants were subjected to discriminant analysis. Many neonatal parameters were not significantly associated with short stature at five years of age. A correct classification of stature (smaller/larger than the 10th...
article 1993
document
Kooi, F.L. (author), TNO Technische Menskunde (author)
When regions containing a counterphasing sine-wave grating are presented side by side and in spatial and temporal quadrature phase, a transparent perception of motion results. This occurs even though none of the stimulus parts is moving. The two percepts of motion in these displays are in opposite directions, one analogous to brightness contrast...
article 1995
document
Nijhoff, W.A. (author), Mulder, T.P.J. (author), Verhagen, H. (author), van Poppel, G. (author), Peters, W.H.M. (author)
The effects of consumption of glucosinolate-containing Brussels sprouts on plasma and urinary glutathione S-transferase (GST) class-α and -π were investigated. Five male and five female non-smoking volunteers were randomly assigned to two groups in a crossover design. Five persons started on a glucosinolate-free diet (control period), while the...
article 1995
document
Grootenhuis, P.A. (author), Westenbrink, S. (author), Sie, C.M.T.L. (author), de Neeling, J.N.D. (author), Kok, F.J. (author), Bouter, L.M. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)
A self-administered semiquantitative food frequency questionnaire including 75 food items and providing information on the habitual intake of 31 nutritional parameters, based on the intake of protein, fat, carbohydrate, fiber and 11 vitamins and minerals, was developed for use in epidemiologic research on chronic disease among the elderly, such...
article 1995
document
Essens, P.J.M.D. (author), TNO Technische Menskunde (author)
Two stages for structuring tone sequences have been distinguished by Povel and Essens (1985). In the first, a mental clock segments a sequence into equal time units (clock model); in the second, intervals are specified in terms of subdivisions of these units. The present findings support the clock model in that it predicts human performance...
article 1995
document
Havenith, G. (author), Inoue, Y. (author), Luttikholt, V. (author), Kenny, W.L. (author)
Cross-section comparisons of the effect of age on physiological responses to heat stress have yielded conflicting results, in part because of the inability to separate chronological age from factors which change in concert with the biological aging process. The present study was designed to examine the relative influence of age on cardiovascular...
article 1995
document
van de Kar, N.C.A.J. (author), Kooistra, T. (author), Vermeer, M. (author), Lesslauer, W. (author), Monnens, L.A.H. (author), van Hinsbergh, V.W.M. (author), TNO Preventie en Gezondheid (author)
Infections with verocytotoxin (VT) producing Escherichia coil have been strongly implicated in the epidemic form of hemolytic uremic syndrome (HUS). Endothelial damage plays a central role in the pathogenesis of HUS. In vitro studies have shown that VT can damage endothelial cells after interaction with its cellular receptor...
article 1995
document
Draijer, R. (author), Atsma, D.E. (author), van der Laarse, A. (author), van Hinsbergh, V.W.M. (author), Gaubius Instituut TNO (author)
Previous studies have demonstrated that cGMP and cAMP reduce the endothelial permeability for fluids and macromolecules when the endothelial permeability is increased by thrombin. In this study, we have investigated the mechanism by which cGMP improves the endothelial barrier function and examined whether nitric oxide (NO) can serve as an...
article 1995
Searched for: +
(1 - 20 of 49)

Pages